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Low-temperature refrigeration control method and system, air conditioner, medium and terminal

A control method and low-temperature technology, applied in heating and ventilation control systems, heating and ventilation safety systems, heating methods, etc., can solve problems such as increased unit cost and undesired cost requirements.

Active Publication Date: 2021-04-06
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) In order to realize the function of low-temperature refrigeration, the existing air conditioner controls the speed of the external fan by adding hardware to ensure that the unit has a suitable low-temperature cooling capacity and reliability under low temperature conditions, which will increase the cost of the unit, and the cost requirements are relatively high The unit is not advisable

Method used

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  • Low-temperature refrigeration control method and system, air conditioner, medium and terminal
  • Low-temperature refrigeration control method and system, air conditioner, medium and terminal
  • Low-temperature refrigeration control method and system, air conditioner, medium and terminal

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Embodiment 1

[0059] The temperature sensor of the air-conditioning unit that the present invention utilizes comprises: indoor ambient temperature sensor, evaporator coil temperature sensor, outdoor ambient temperature sensor (conventional air conditioner all can have these temperature sensors: indoor ambient temperature sensor function: control mode such as refrigeration, heating On or off; evaporator coil temperature sensor function: anti-high temperature, anti-freezing; outdoor environment temperature sensor function: outdoor environment temperature detection, to determine whether to enter the low-temperature cooling function or high-temperature heating function), without increasing the air-conditioning hardware and cost Under normal circumstances, rely on the temperature detected by the evaporator coil temperature sensor to determine the operating state of the unit, so as to adjust the speed of the air conditioner's external fan, control the evaporation temperature, and achieve low-temper...

Embodiment 2

[0071] The sensors of the air conditioner include: indoor ambient temperature sensor, evaporator coil temperature sensor, and outdoor ambient temperature sensor. T is used below 内环 Indicates the temperature collected by the indoor ambient temperature sensor, T 蒸发盘管 Indicates the temperature collected by the evaporator coil temperature sensor, T 外环 Indicates the temperature collected by the outdoor ambient temperature sensor. Select a suitable position on the evaporator pipeline to install the evaporator coil temperature sensor, which can be used as the detection value of the evaporation temperature (evaporation pressure) during low-temperature refrigeration. By controlling the evaporation temperature at an appropriate level, the function of low-temperature refrigeration can be satisfied.

[0072] The schematic diagram of the control method for low-temperature refrigeration provided by the embodiment of the present invention is as follows: figure 2 shown, including:

[0073...

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Abstract

The invention belongs to the technical field of air conditioner refrigeration, and discloses a low-temperature refrigeration control method and system, an air conditioner, a medium and a terminal. The low-temperature refrigeration control method comprises the steps that unit refrigeration is started, and a unit sensor synchronously detects a T, a T<evaporation coil> and a T<outer ring>; when the T<outer ring> is smaller than a preset value T0, the unit enters low-temperature refrigeration, otherwise, the unit enters high-temperature refrigeration; a unit outer fan firstly operates for 90s at the rotating speed of the highest gear; the detected T<evaporation coil> is compared with preset values T1, T2 and T3, and the t-gear operation time is compared with the preset value t0; and the preset value is defined, wherein the specific value is adjusted according to the actual situation. According to the low-temperature refrigeration control method, under the condition that air conditioner hardware and cost are not increased, the operation state of the unit is judged according to the temperature detected by an evaporator coil temperature sensor, the rotating speed of an air conditioner external fan is adjusted, the evaporation temperature is controlled, low-temperature refrigeration is achieved by controlling the evaporation temperature to be at a certain level, and cost is low.

Description

technical field [0001] The invention belongs to the technical field of air conditioning and refrigeration, and in particular relates to a control method, a control system, an air conditioner, a medium and a terminal for low temperature refrigeration. Background technique [0002] At present, in some places with fixed heat sources, such as public places such as baking rooms, restaurants, and railway stations, and places where electronic equipment is stored, such as computer rooms and base stations, these places need to be heated even when the outdoor temperature is relatively low. The air conditioner cools. [0003] When the outdoor ambient temperature is relatively low, the difference between the condensing pressure and the evaporating pressure of the air conditioner is very small, there is no power to push the refrigerant into the evaporator, and the refrigerant flow rate is very small. After entering the evaporator, the refrigerant evaporates without even passing through a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/64F24F11/871F24F11/67F24F110/12F24F140/20
CPCF24F11/64F24F11/871F24F11/67F24F2110/12F24F2140/20
Inventor 王芳杨伟苏培焕赖桃辉栾坤鹏
Owner GREE ELECTRIC APPLIANCES INC